#399

backend/app/controllers/post_imports_controller.rb

@@ -0,0 +1,37 @@
+class PostImportsController < ApplicationController
+  before_action :require_member!
+
+  def preview
+    source =
+        if params[:format] == 'google_sheets'
+          PostImportGoogleSheetsFetcher.fetch!(params[:source], rate_key: current_user.id)
+        else
+          params[:source]
+        end
+    format = params[:format] == 'google_sheets' ? 'csv' : params[:format]
+    parsed = PostImportSourceParser.new(source:, format:,
+                                        has_header: params[:has_header], json_path: params[:json_path]).parse
+    url_column = params[:url_column].presence || (parsed[:columns].length == 1 ? 0 : nil)
+    return render_bad_request('URL 列を選択してください．') if url_column.nil?
+
+    rows = PostImportPreviewer.new(parsed:, url_column:, mappings: params[:mappings],
+                                   existing: params[:existing]).preview
+    render json: parsed.slice(:columns).merge(rows:)
+  rescue ArgumentError => e
+    render_bad_request(e.message)
+  end
+
+  def create
+    render json: PostImportRunner.new(actor: current_user, rows: params[:rows].to_a).run,
+           status: :created
+  end
+
+  private
+
+  def require_member!
+    return head :unauthorized unless current_user
+    return if current_user.gte_member?
+
+    head :forbidden
+  end
+end